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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 107 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  14. 14.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  15. 15.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  16. 16.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  19. 19.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.An angle measures 135°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  31. 31.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  32. 32.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  38. 38.An angle measures 150°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. 45
  3. 30
  4. 145
  5. 75
  6. 90
  7. 55
  8. 155
  9. 120
  10. 85
  11. 210
  12. 130
  13. 30
  14. Acute
  15. Acute
  16. 50
  17. 80
  18. Straight
  19. 220
  20. 100
  21. 135
  22. 15
  23. 120
  24. 90
  25. 125
  26. 180
  27. 30
  28. Obtuse
  29. 55
  30. 70
  31. Acute
  32. 50
  33. 100
  34. 70
  35. 10
  36. 150
  37. 105
  38. Obtuse
  39. 90
  40. 25

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